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Finding the Fourth Proportional to 487,218.65, 672,376.75 and 272,367.77

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Solution

The fourth proportional to 487,218.65, 672,376.75 and 272,367.77 is: 375,875.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,218.65 : 672,376.75 = 272,367.77 : x
  2. Step 2: Convert to fraction form
    487,218.65/672,376.75 = 272,367.77/x
  3. Step 3: Cross multiply
    487,218.65x = 672,376.75 × 272,367.77
  4. Step 4: Simplify right side
    487,218.65x = 183,133,751,954.54
  5. Step 5: Solve for x
    x = 183,133,751,954.54/487,218.65
  6. Step 6: Final answer
    x = 375,875.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.